I just replaced our company's 15 year old PBX with an elastix appliance. I noticed that on the FOP, all my analog lines just display on the screen with there extension numbers but I couldn't do anything such as monitoring activities, initiated call etc. I added a SIP extension and all the features of FOP are available on my SIP extension. Is it normal? Do FOP does not support zap channels? An advance thanks for any assistance.